• Desulfurization Process and Kinetics of Fe/Activated

    OverviewFGD chemistryMethodsHistorySulfuric acid mist formationFacts and statisticsAlternative methods of reducing sulfur dioxide emissionsSee also

    Most FGD systems employ two stages: one for fly ashremoval and the other for SO 2 removal. Attempts have been made to remove both the fly ash and SO 2 in one scrubbing vessel. However, these systems experienced severe maintenance problems and low removal efficiency. In wet scrubbing systems, the flue gas normally passes first through a fly ash removal dev, either an electrostatic precipitator or a baghouse, and then into the SO 2-absorber. However, in dry injection or spray drying operations, the S

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  • Flue-gas desulfurization Wikipedia

  • Hydrodesulfurization Wikipedia

    OverviewHistoryProcess chemistryProcess descriptionSulfur compounds in refinery HDS feedstocksCatalysts and mechanismsOther usesSee also

    Hydrodesulfurization (HDS) is a catalytic chemical process widely used to remove sulfur (S) from natural gas and from refined petroleum products, such as gasoline or petrol, jet fuel, kerosene, diesel fuel, and fuel oils. The purpose of removing the sulfur, and creating products such as ultra-low-sulfur diesel, is to reduce the sulfur dioxide (SO 2) emissions that result from using those fuels in automotive vehicles, aircraft, railroad locomotives, ships, gas or oil burning power plants, residential and industrial furnaces, and other forms o

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  • Regenerable Co-ZnO-based nanocomposites for high

    May 01, 2020· Desulfurization performance during high-temperature desulfurization test As 28% Co-ZnO was the most efficient desulfurization sorbent among different doping contents and different dopant metals including Fe, Cr and Co, it was chosen for high-temperature desulfurization up to 600 °C. 28% Ni-ZnO was also tested for comparison.

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  • Hydrodesulfurization an overview ScienceDirect Topics

  • [PDF] Desulfurization and Kinetic Study of Diesel Fuel by

    The present research studied a batch adsorption desulfurization process for diesel fuel containing 580ppm sulfur, based on physical adsorption of refractory sulfur compounds on activated carbon (AC). The effects of time, temperature, diesel to AC ratio, AC particle size, mixing velocity, and initial sulfur concentration in commercial diesel fuel on the desulfurization efficiency were studied.

  • Air Pollution Control Technology Fact Sheet

    b. Temperature: For wet scrubbers, typical inlet gas temperatures are 150°C to 370°C (300°F to 700°F) (FETC, 1996). For spray dry systems, the temperature of the flue gas exiting the absorber must be 10°C to 15°C (20°F to 30°F) above the adiabatic saturation temperature. Optimal temperatures for SO 2

  • Desulfurization an overview ScienceDirect Topics

    Paul CaubèrePhilippe Coutrot, in Comprehensive Organic Synthesis, 1991. 4.3.1.2 Raney Nickel and Nickel (0) Complexes. Desulfurization of organic compounds with Raney nickel is an old reaction 1 with widespread application. 1,2 Raney Ni exists in several forms, called W-1 to W-8, 1b,1c and differing in the procedures for their preparation. The properties (reactivity, stability, etc.) vary

  • Review of H2S sorbents at low-temperature desulfurization

    methods, adsorption process temperature, and specific . surface area were investigated by J iang et al,. (POME) biogas desulfurization at ambient temperature and pressure. One of the key

  • Desulphurization of Hot Metal IspatGuru

    Oct 16, 2013· The largest temperature loss occurs during injection rather than skimming. A temperature loss of 30 deg C is expected during the desulphurization process. Desulphurizing process donot have any major effect on the refractory lining life of

  • Desulfurization of steel [SubsTech]

    May 31, 2012· The most popular method of desulfurization is removal of sulfur from molten steel to the basic reducing slag. Basic slag is a slag containing mainly basic oxides: CaO, MgO, MnO, FeO. A typical basic slag consists of 35-60% CaO + MgO, 10-25% FeO, 15-30% SiO 2, 5-20% MnO. Transition of sulfur from steel to slag may be presented by the chemical equation: [S] + (CaO) = (CaS) + [O] The

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  • Desulfurization of Coal

    temperature desulfurization process is well proven, the reduction of sorbent consumption is required to minimize the costs for sorbent and residue management. Flue gas desulfurization (FGD) removes the SO 2 from the flue gas of coal-fired plants.

  • DEEP DESULFURIZATION OF DIESEL FUELS BY A NOVEL

    Oct 01, 2002· Effect of temperature on the desulfurization process was examined. Adsorption desulfurization at ambient temperature, 24 h{sup -1} of LHSV over A-2 is efficient to remove dibenzothiophene (DBT) in the model diesel fuel, but difficult to remove 4-methyldibenzothiophene (4-MDBT) and 4,6-dimethyl-dibenzothiophene (4,6-DMDBT).

  • EFFECT OF TEMPERATURE & PRESSURE ON OXIDATIVE

    Feb 29, 2016· There are several disadvantages by different desulfurization process. Out of all techniques we are choosen the oxidative desulfurization process. We are studying the effect of temperature on our process mechanism.The trends in oxidation of 2 model sulfur compounds at atmospheric,elevated static pressure and at different temperatures are

  • Novel Dry-Desulfurization Process Using Ca(OH)2/Fly Ash

    Nov 16, 2004· A dry-desulfurization process using Ca(OH)2/fly ash sorbent and a circulating fluidized bed (CFB) was developed. Its aim was to achieve high SO2 removal efficiency without humidification and production of CaSO4 as the main byproduct. The CaSO4 produced could be used to treat alkalized soil. An 83% SO2 removal rate was demonstrated, and a byproduct with a high CaSO4 content was

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  • A PROCESS OPTIMIZATION ON HIGH TEMPERATURE

    Key words: desulfurization, electrolysis, hot metal, pretreatment-temperature, current INTRODUCTION In traditional hot metal desulfurization processes [1], desulfurization operation is mainly carried out by adding a desulfurizer. In the process of desulfurization

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  • Flue-Gas Desulfurization (“Scrubbers”)

    Flue-Gas Desulfurization (“Scrubbers”) (Nazaroff & Alvarez-Cohen, Se ction 7.C.2, much augmented) The key aspect of the process is the dissolution of the gas from the fumes into a liquid made of water At the temperature and pressure common in the operation of scrubbers,

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  • DESULFURIZATION Redecam Group

    temperature and re-activate the sorbent, if necessary. Our WIS has special nozzles that convert the water into a fog, giving us the highest evaporation rates on the market. Our WIS can, in certain cases, be key to an optimal desulfurization process, as desulfurization is highly dependent on

  • Desulfurization of Hydrocarbons SpinTek

    This Direct Extraction(DXs) process is scale from pilot size systems up to 200,000 barrels per day (bpd) systems. This desulfurization technology can be applied to Middle Distillates: Gasoline, Transmix, and Diesel No. 2. Advantages. No hydrogenation & no oxidation process requiring hazardous oxidation agents, e.g., peroxide

  • An evaluation of desulfurization technologies for sulfur

    The current industrial method for removal of sulfur from fuels is hydrodesulfurization (HDS), which is a high temperature, high pressure catalytic process. This makes HDS a very costly option for deep desulfurization. Moreover, HDS is not effective for removing heterocyclic sulfur compounds such as dibenzothiophene (DBT) and its derivatives, especially 4,6-dimethyldibenzothiophene (4,6-DMDBT).

  • High-Temperature Desulfurization of Low-Btu Gas

    ----- Table III-ll Economic Evaluation Regenerative Acceptor Desulfurization Process Basis: 70% Plant Operating Factor (6132 hr/yr) Case Coal Required Ton/yr (6% Moisture) Higher Heating Value, Btu/yr Desulfurized Producer Gas To Station Mols/Hr Temperature Pressure Higher Heating Value, Btu/yr HHV + Sensible Heat Content, .per year Cost

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  • Wet Flue Gas Desulfurization (FGD)

    Wet Flue Gas Desulfurization (FGD) In most developed countries, wet scrubber (flue-gas desulfurization; FGD) technology is a well-established process for removing SO 2. Also, costs have been reduced significantly from 150-200 $/KW in the 1980s

  • US5961820A Desulfurization process utilizing an

    Sulfur-containing carbonaceous materials are desulfurized by reaction with a mixture of an oxidizing agent and a carbonyl compound under alkaline conditions at a temperature ranging from ambient temperature to about 250° F. and a pressure of about 1 atmosphere to 2 atmospheres. The products of the reaction are a desulfurized carbonaceous material in which the sulfur content is less than about

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  • Effect of Silicon on the Desulfurization of Al-Killed

    Oct 02, 2012· temperature of the melt surface (because its alumina sheath would dissolve in the slag); the lower ther-mocouple was used monitor the temperature of the melt during the desulfurization reaction. (6) After adding the slag, the steel melt was sampled at regular intervals with fused-quartz tubes; the steel samples were subsequently analyzed (using the